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8.2: The Ellipse - Mathematics LibreTexts
Equations of Ellipses | College Algebra - Lumen Learning
Ellipse - Equation, Formula, Properties, Graphing - Cuemath
8.1 The Ellipse - College Algebra 2e - OpenStax
Ellipse – Definition, Parts, Equation, and Diagrams - Math Monks
Equation of an Ellipse - Mathwarehouse.com
Define vertical ellipse. - Formula & Characteristics - CK-12 Foundation
Ellipse: Definition, Equations, Derivations, Observations, Q&A
4.1: Ellipses - Mathematics LibreTexts
12.2: The Ellipse - Mathematics LibreTexts